Temperature estimation of CHV brake discs using an energy balance approach

Artus, Samuel; Cocquempot, Vincent; Staroswiecki, Μ.; Hayat, S.; Covo, C.

doi:10.1109/itsc.2004.1398930

Cited by 4 publications

(2 citation statements)

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“…A numerical efficient thermal model for commercial vehicles and short repeated braking sequences is presented in Ref. [6]. This approach considers only one node.…”

Section: Previous Workmentioning

confidence: 99%

Numerical Efficient Thermal Network for Calculating the Brake Disc Temperature

Arnold¹,

Bolay²,

Stump³

et al. 2020

JMEA

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The simulation of the brake disc temperature is an important tool in the development of passenger cars. Nowadays thermal models of brake discs are real-time applications, running on electronic control units (ECUs) of cars to improve the vehicle safety in several ways. These models are often working with full empirical methods, leading to large deviations between calculation and measurement. To meet the requirements of automotive safety integrity levels (ASILs), these thermal models cannot rely on the state of the art ambient air temperature sensors, which causes unacceptable deviations. Focusing on numerical efficient thermal simulations, a new approach of a semi-analytical thermal network for simulating the brake disc temperature with minimal effort is proposed. The thermal network is based on lumped parameters, using two thermal capacity nodes and a constant ambient temperature. Using semi-analytical correlations, the model can be adapted to different geometries and car lines effortlessly. The empirical parameters of the model result only from two standardized tests. These parameters are used to evaluate the estimation accuracy in real driving situations. Additionally, the adaptability is tested for two different car lines and four brake disc dimensions. These tests are initially performed with unchanged parameters and afterwards with refitted parameters. The model shows a good estimation for the tested load cases. Compared to the state of the art, the proposed model is less accurate than complex finite element method (FEM) models and computational fluid dynamic (CFD) approaches, but shows a higher accuracy and better adaptability than other lumped parameter models with comparable numerical effort. Hence, possible applications can be dimensioning the brake system in the development process of new car lines or a real-time simulation on the latest ECU in the vehicle.Corresponding author: Manuel Arnold, M.Sc., research fields: mechanical engineering, temperature models, safety functions. simulation is used for calculating the friction power.

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“…A numerical efficient thermal model for commercial vehicles and short repeated braking sequences is presented in Ref. [6]. This approach considers only one node.…”

Section: Previous Workmentioning

confidence: 99%

Numerical Efficient Thermal Network for Calculating the Brake Disc Temperature

Arnold¹,

Bolay²,

Stump³

et al. 2020

JMEA

View full text Add to dashboard Cite

show abstract

“…Sıcaklık etkisi, aşırı ısınmada daha büyük önem taşır ve bunun sık tekrar etmesi fren diskleriyle balatalar arasındaki sürtünme katsayısını azaltarak tehlikeye sokar. Bu olgu, fren etkinliğinin azalması (fading) olarak adlandırılır [14][15][16].…”

Section: Gi̇ri̇ş (Introduction)unclassified

Fren Di̇sk Sicakliğinin Frenleme Performansina Etki̇si̇

Erdem¹,

Altıparmak²

2014

Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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ÖZETBu deneysel çalışmada, fren disk sıcaklıklarındaki artışın taşıtın frenleme performansına etkileri araştırılmıştır. Bu amaçla, frenleme performansının en önemli göstergesi olan durma mesafesi testleri yapılmıştır. Testler, bir hafif ticari taşıtta, değişik disk sıcaklıkları, pedal kuvvetleri, taşıt yükleri ve başlangıç hızlarında gerçekleştirilmiştir. Yapılan fren etkinliği test sonuçları, fren disklerindeki sıcaklık artışının taşıtın frenleme mesafesini olumsuz etkilediğini göstermiştir. Farklı pedal kuvvetleri, frenleme başlangıç hızları ve taşıt yükü değişimlerine göre değerlendirilen sonuçlardan, disk sıcaklığındaki artışın frenleme mesafesini artırdığı gözlenmiştir. Tipik bir yol testi sonucu olarak; 80 km/h hızla ve maksimum pedal kuvvetiyle 63ºC fren disk sıcaklığında taşıt 44,9 m'de dururken, 298 ºC disk sıcaklığında durma mesafesi %17,4 oranında artarak 52,71 m olarak ölçülmüştür.Anahtar kelimeler: Frenleme performansı, yol deneyi, durma mesafesi, disk sıcaklığı, hafif ticari taşıt THE EFFECT OF BRAKE DISC TEMPERATURE ON BRAKING PERFORMANCE ABSTRACTIn this experimental work, effect of increasing in brake disc temperature on braking performance was investigated. For this purpose, braking distance tests which the criteria of braking performance were carried out. The tests were conducted on a small-size commercial vehicle for different disc temperatures, pedal forces, the vehicle loads and for initial vehicle speeds. Test results of stopping (braking) distance were analyzed for the variation of disc temperatures. The results showed that the stopping distance is considerable increased when the disc temperature is increased for different vehicle speed and pedal forces. Typically, at the vehicle speed of 80 km/h and maximum pedal force for 63 ºC disc temperature, 44.9 m stopping distance was measured. When the temperature is increased as 298 ºC, stopping distance is increased as 52.71 m with the rate of 17.4% at road test.

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